Heat oven to 400°. Arrange apples over dough. Pour sauce evenly over apples. Roll remaining disk of dough into a 12" round and place over top of pie. Pinch top and bottom edges together and fold under; crimp edges. Brush with egg mixture; sprinkle with 1 tbsp. sugar. Cut three 1"-long slits in top of pie. Bake until crust is golden brown and filling is bubbling, about 1 hour. Let cool completely before serving.